Texas Instruments UCC27531QDBVRQ1

Overview

UCC27531QDBVRQ1 from Texas Instruments is an automotive-grade, single-channel, high-speed gate driver IC for MOSFETs and IGBTs, delivering 2.5-A source and 5-A sink peak current at 18-V VDD, with 17-ns typical propagation delay and rail-to-rail output swing - used in HEV/EV on-board chargers and SiC FET converters.

For engineers reviewing the UCC27531QDBVRQ1 datasheet, UCC27531QDBVRQ1 pinout, UCC27531QDBVRQ1 application, or UCC27531QDBVRQ1 equivalent, key selection considerations include its split-output architecture (OUTH/OUTL), –5-V input tolerance, AEC-Q100 Grade 1 qualification (–40°C to 140°C), TTL/CMOS-compatible logic thresholds independent of VDD, and UVLO with 8.9-V turn-on threshold.

Technical Context

The UCC27531QDBVRQ1 implements a hybrid pull-up output stage combining N- and P-channel MOSFETs to deliver brief 2.5-A peak sourcing during Miller plateau transition, while its dedicated 5-A sink path via OUTL minimizes pulldown impedance (0.65 Ω typical) for robust Miller immunity. Its EN pin features internal 500-kΩ pull-up to 5.8-V reference and TTL-compatible threshold (1.9-V typical high).

Input logic uses fixed-voltage thresholds (VIN_H = 2.0 V typ, VIN_L = 1.0 V typ, 1-V hysteresis) independent of VDD, enabling reliable interfacing with 3.3-V or 5-V controllers; UVLO asserts output low below 8.9-V VDD with 0.7-V hysteresis to prevent glitchy power-up behavior in automotive transients.

Key Specifications

Pinout & Package

UCC27531QDBVRQ1 is housed in a 6-pin SOT-23 (DBV) package measuring 1.6 mm × 2.9 mm, optimized for space-constrained automotive power modules and DC/DC converters.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar gate driver applications.

Compared with UCC27532QDBVRQ1, the UCC27531QDBVRQ1 offers native non-inverting logic for direct PWM interface, while LM5113SD/NOPB delivers greater sink strength but sacrifices automotive qualification and negative input capability - making UCC27531QDBVRQ1 optimal for AEC-Q100-compliant SiC and IGBT gate drive where polarity and fault tolerance are primary constraints.

Availability

UCC27531QDBVRQ1 is available at Aetrix Electronics and suitable for HEV/EV on-board chargers, solar inverters, and industrial motor drives requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for UCC27531QDBVRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with deep expertise in automotive-grade reliability and functional safety.

The UCC27531QDBVRQ1 belongs to TI's automotive-qualified gate driver portfolio, engineered specifically for high-efficiency, high-reliability power conversion in electric vehicles, renewable energy, and industrial automation systems.

FAQ

What is the maximum allowable VDD voltage for UCC27531QDBVRQ1?

The absolute maximum VDD voltage for UCC27531QDBVRQ1 is 35 V, but the recommended operating range is 10 V to 32 V. Operation above 32 V risks exceeding safe junction temperature or violating SOA limits under transient load conditions. The device's UVLO remains active up to 32 V, ensuring predictable disable behavior during overvoltage events. Always use a 1-µF ceramic capacitor directly between VDD and GND to maintain stability at high dI/dt.

Does UCC27531QDBVRQ1 support both high-side and low-side configurations?

Yes, UCC27531QDBVRQ1 can be used as either a high-side or low-side driver depending on circuit biasing and isolation. When configured as a high-side driver, it requires level-shifted input signals and proper bootstrap or isolated supply; as a low-side driver, it connects directly to controller ground. Its split outputs (OUTH/OUTL) simplify gate loop design in both topologies, and the –5-V input tolerance supports referenced signal integrity in high-side applications with ground bounce.

How does the split-output architecture of UCC27531QDBVRQ1 improve EMI performance?

The split-output architecture of UCC27531QDBVRQ1 allows independent gate resistors on OUTH (turn-on) and OUTL (turn-off), enabling precise control of rise/fall times to meet EMI compliance targets. By slowing turn-off slightly while maintaining fast turn-on, designers reduce high-frequency spectral content without sacrificing efficiency. This capability is especially valuable in automotive EMC testing (CISPR-25 Class 5), where uncontrolled dV/dt causes radiated emissions peaks above 30 MHz.

Is UCC27531QDBVRQ1 pin-compatible with any other TI gate drivers?

UCC27531QDBVRQ1 shares the same 6-pin SOT-23 (DBV) footprint and pinout with UCC27532QDBVRQ1, differing only in input logic polarity (non-inverting vs inverting). No other TI gate driver in the DBV package offers identical pin mapping, function set, and automotive qualification. Substitution with UCC27532QDBVRQ1 requires verifying controller signal polarity and revalidating timing margins due to identical propagation characteristics but opposite logic response.

What thermal derating guidance applies to UCC27531QDBVRQ1 in continuous 5-A sink operation?

At 5-A continuous sink current, UCC27531QDBVRQ1 dissipates ~0.325 W (5 A × 0.065 V) in the OUTL stage. With R_θJA = 178.3°C/W in standard JEDEC 2S2P layout, junction temperature rise exceeds 58°C - requiring PCB copper area ≥250 mm² and thermal vias under the exposed pad (if present) to sustain 140°C ambient. For sustained 5-A loads, derate maximum ambient temperature to ≤110°C unless enhanced cooling is implemented, per TI's SLVSC82B Section 7.4.